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Flashing Standby LED No StartUp.

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  • enrmas May 25, 2008

    Thanks Jerry.

    I am definitely not an expert but I can use a soldering iron and a tester.

    You referred to board swapping which doesn't tell me too much.

    If you explain me precisely what I have to do I can give a try and give you further information.


  • enrmas May 26, 2008


    Thanks a lot. Now it's a lot clearer.

    Anybody who could do that in my area (UK, postcode KT11...) for a reasonable price?


  • enrmas May 26, 2008

    Thanks once more Jerry



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Most of the time, this is from a failed power supply board, and or a short on one of the other boards. Without board swapping this is a difficult thing to troubleshoot.

Jerry G.

Posted on May 25, 2008

  • Jerry Greenberg
    Jerry Greenberg May 26, 2008

    There is no actual support by the manufactures for component level service in these sets. Even if I had a detailed service manual, I would not be able to determine the failed components unless I was to spend many hours troubleshooting the set using the proper diagnostics and instruntation. This would not be feasable by any means in comparision to exchanging complete boards. The circuit designs are extremely complex, and the are thousands of SMD type compenents involved.

    For soldering, you cannot go in with a standard soldering iron and change parts. The micro size SMD parts are changed using IR soldering systems that are very costly. Some of the pin spacings on some of the devices are closer than 1/50 of an inch apart and almost as find as a human hair.

    If you were able to determine the defective part, if the the part is not a generic type that can be bought at a regular electronics parts supplier, you would not be able to buy it from the manufacture since they do not support component level service. In many instances the specialized IC's require some software loading and parameter adjustment to adjust to the particular set.

    This is why the service reps are given boards for exchange from the manufacture. It is the same method as for servicing a computer but more involved.

    With board exchange, the set can usually be serviced within thirty minutes to one hour including calibration setups, unless there are some problems with the wiring harnesses, or something unexpected.

    Jerry G.

  • Jerry Greenberg
    Jerry Greenberg May 26, 2008

    You have to find out in your area who the authorized service people are for the TV manufacture. In the user instruction manual there are usually listings. I tried to find Bush using Google and Yahoo and came up with nothing in the way of support. You can ask the dealer where you bought the set.

    I have a feeling that this set may be a re-badged no-name brand set. There may not be any service support at all from what I can see. Here in Canada I have never seen this brand name.

    The corner service shops who are usualy independent, may not be able to have the spare boards for your set, or they may have to buy them to try them if they can source them. This will be more expensive than using the factory authorized service rep.

    I can tell you in advance that the boards for these TV sets are very expensive. In many cases it is actualy cheaper to replace the set rather than to service it.

    When you replace this TV set, make sure you buy a set that has local support and service. Stay with the big name brands that are well known. You may pay a little more, but it is worth the investment.

    Jerry G.



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